package com.hx.util;
|
|
import org.apache.commons.io.FileUtils;
|
|
import java.io.*;
|
import java.net.URL;
|
|
/**
|
* 文件读取工具类
|
* @author ChenJiaHe
|
* @Date 2020-06-17
|
*/
|
public class FileUtil {
|
|
/**
|
* @param pathUrl 网络路径
|
* @return 文件
|
*/
|
public static File getUrlFile(String pathUrl){
|
File temp = null;
|
try{
|
URL url = new URL(pathUrl);
|
temp = File.createTempFile("temp", ".xls");
|
FileUtils.copyURLToFile(url, temp);
|
temp.deleteOnExit();
|
}catch (Exception e){
|
throw new RuntimeException("通过URL获取文件出错",e);
|
}
|
return temp;
|
}
|
|
/**
|
* 读取文件内容，作为字符串返回
|
*/
|
public static String readFileAsString(String filePath) throws IOException {
|
File file = new File(filePath);
|
if (!file.exists()) {
|
throw new FileNotFoundException(filePath);
|
}
|
|
if (file.length() > 1024 * 1024 * 1024) {
|
throw new IOException("File is too large");
|
}
|
|
StringBuilder sb = new StringBuilder((int) (file.length()));
|
// 创建字节输入流
|
FileInputStream fis = new FileInputStream(filePath);
|
// 创建一个长度为10240的Buffer
|
byte[] bbuf = new byte[10240];
|
// 用于保存实际读取的字节数
|
int hasRead = 0;
|
while ( (hasRead = fis.read(bbuf)) > 0 ) {
|
sb.append(new String(bbuf, 0, hasRead));
|
}
|
fis.close();
|
return sb.toString();
|
}
|
|
/**
|
* 根据文件路径读取byte[] 数组
|
*/
|
public static byte[] readFileByBytes(String filePath) throws IOException {
|
File file = new File(filePath);
|
if (!file.exists()) {
|
throw new FileNotFoundException(filePath);
|
} else {
|
ByteArrayOutputStream bos = new ByteArrayOutputStream((int) file.length());
|
BufferedInputStream in = null;
|
|
try {
|
in = new BufferedInputStream(new FileInputStream(file));
|
short bufSize = 1024;
|
byte[] buffer = new byte[bufSize];
|
int len1;
|
while (-1 != (len1 = in.read(buffer, 0, bufSize))) {
|
bos.write(buffer, 0, len1);
|
}
|
|
byte[] var7 = bos.toByteArray();
|
return var7;
|
} finally {
|
try {
|
if (in != null) {
|
in.close();
|
}
|
} catch (IOException var14) {
|
var14.printStackTrace();
|
}
|
|
bos.close();
|
}
|
}
|
}
|
}
|
